Philippines. National Economic and Development Authority & Philippines. Regional Development Council, Region I. (1985). Regional development profile [of] Ilocos region, CY 1985. National Economic and Development Authority.
Chicago-referens (17:e uppl.)Philippines. National Economic and Development Authority och Region I. Philippines. Regional Development Council. Regional Development Profile [of] Ilocos Region, CY 1985. San Fernando, La Union: National Economic and Development Authority, 1985.
MLA-referens (9:e uppl.)Philippines. National Economic and Development Authority och Region I. Philippines. Regional Development Council. Regional Development Profile [of] Ilocos Region, CY 1985. National Economic and Development Authority, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.